Date Sept 8 2014 Page Table of Contents
Date: Sept 8, 2014 Page: Table of Contents p. 1 Glossary – Last 5 pages Warm-ups – Front Cover W. O. D. Extremophile – is an organism that thrives in physically or geochemically extreme conditions. Question: Name one location you could find an extremophile.
Today’s Plan • Warm-up • Prokaryote notes • Reading 470 -477 with section assessment 1 -5 • Reflection **Homework: Due Tomorrow! Bring something tiny to observe under the microscope. A human hair is not an option. **
Theories of Life p. 10 • 1. Spontaneous Generation – Life appears when non-living materials sit for a while. • 2. Primordial Soup – Lightning struck the ancient oceans, creating amino acids from CH 4 and NH 3. • 3. Hydrothermal Vents – Underwater volcanoes released gases CH 4 and NH 3 and heat to create first amino acids.
Prokaryote Notes: 1. 2. 3. 4. When did the first prokaryotes appear? Do prokaryotes have a nucleus? How many prokaryotes are on Earth? What kingdoms do prokaryotes belong to?
When did the first prokaryotes appear? • 3. 5 Billion years ago or more, the first bacteria formed.
Do prokaryotes have a nucleus?
How many prokaryotes are on Earth? • 5, 000, 000, 000 • Five million trillion (that's a five with 30 zeroes after it). • Look at it this way. If each bacterium were a penny, the stack would reach a trillion light years.
What kingdoms do prokaryotes belong to? • Archaebacteria • Eubacteria
Reflection: Name one positive role prokaryotes play on the planet.
- Slides: 10